Home | History | Annotate | Line # | Download | only in isa
ast.c revision 1.24
      1  1.24      cgd /*	$NetBSD: ast.c,v 1.24 1996/04/04 07:08:10 cgd Exp $	*/
      2   1.9      cgd 
      3   1.1      cgd /*
      4  1.22      cgd  * Copyright (c) 1996 Christopher G. Demetriou.  All rights reserved.
      5  1.15  mycroft  * Copyright (c) 1995 Charles Hannum.  All rights reserved.
      6   1.1      cgd  *
      7  1.15  mycroft  * This code is derived from public-domain software written by
      8  1.15  mycroft  * Roland McGrath.
      9  1.15  mycroft  *
     10  1.15  mycroft  * Redistribution and use in source and binary forms, with or without
     11  1.15  mycroft  * modification, are permitted provided that the following conditions
     12  1.15  mycroft  * are met:
     13  1.15  mycroft  * 1. Redistributions of source code must retain the above copyright
     14  1.15  mycroft  *    notice, this list of conditions and the following disclaimer.
     15  1.15  mycroft  * 2. Redistributions in binary form must reproduce the above copyright
     16  1.15  mycroft  *    notice, this list of conditions and the following disclaimer in the
     17  1.15  mycroft  *    documentation and/or other materials provided with the distribution.
     18  1.15  mycroft  * 3. All advertising materials mentioning features or use of this software
     19  1.15  mycroft  *    must display the following acknowledgement:
     20  1.15  mycroft  *	This product includes software developed by Charles Hannum.
     21  1.15  mycroft  * 4. The name of the author may not be used to endorse or promote products
     22  1.15  mycroft  *    derived from this software without specific prior written permission.
     23  1.15  mycroft  *
     24  1.15  mycroft  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     25  1.15  mycroft  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     26  1.15  mycroft  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     27  1.15  mycroft  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     28  1.15  mycroft  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     29  1.15  mycroft  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     30  1.15  mycroft  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     31  1.15  mycroft  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     32  1.15  mycroft  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     33  1.15  mycroft  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     34   1.1      cgd  */
     35   1.1      cgd 
     36   1.5  mycroft #include <sys/param.h>
     37   1.2  mycroft #include <sys/device.h>
     38   1.1      cgd 
     39  1.22      cgd #include <machine/bus.h>
     40   1.5  mycroft 
     41  1.17      cgd #include <dev/isa/isavar.h>
     42  1.20      cgd #include <dev/isa/comreg.h>
     43  1.21      cgd #include <dev/isa/comvar.h>
     44  1.20      cgd 
     45  1.20      cgd #define	NSLAVES	4
     46   1.1      cgd 
     47   1.2  mycroft struct ast_softc {
     48   1.2  mycroft 	struct device sc_dev;
     49  1.17      cgd 	void *sc_ih;
     50   1.7  mycroft 
     51  1.22      cgd 	bus_chipset_tag_t sc_bc;
     52  1.11  mycroft 	int sc_iobase;
     53  1.22      cgd 
     54  1.20      cgd 	int sc_alive;			/* mask of slave units attached */
     55  1.20      cgd 	void *sc_slaves[NSLAVES];	/* com device unit numbers */
     56  1.22      cgd 	bus_io_handle_t sc_slaveioh[NSLAVES];
     57   1.5  mycroft };
     58   1.5  mycroft 
     59   1.5  mycroft int astprobe();
     60   1.5  mycroft void astattach();
     61  1.17      cgd int astintr __P((void *));
     62   1.5  mycroft 
     63  1.23  thorpej struct cfattach ast_ca = {
     64  1.23  thorpej 	sizeof(struct ast_softc), astprobe, astattach
     65  1.23  thorpej };
     66  1.23  thorpej 
     67  1.23  thorpej struct cfdriver ast_cd = {
     68  1.23  thorpej 	NULL, "ast", DV_TTY
     69   1.5  mycroft };
     70   1.1      cgd 
     71   1.1      cgd int
     72   1.5  mycroft astprobe(parent, self, aux)
     73   1.5  mycroft 	struct device *parent, *self;
     74   1.5  mycroft 	void *aux;
     75   1.1      cgd {
     76   1.5  mycroft 	struct isa_attach_args *ia = aux;
     77  1.22      cgd 	int iobase = ia->ia_iobase;
     78  1.22      cgd 	bus_chipset_tag_t bc = ia->ia_bc;
     79  1.22      cgd 	bus_io_handle_t ioh;
     80  1.22      cgd 	int i, rv = 1;
     81   1.2  mycroft 
     82   1.1      cgd 	/*
     83   1.1      cgd 	 * Do the normal com probe for the first UART and assume
     84  1.22      cgd 	 * its presence, and the ability to map the other UARTS,
     85  1.22      cgd 	 * means there is a multiport board there.
     86   1.5  mycroft 	 * XXX Needs more robustness.
     87   1.1      cgd 	 */
     88   1.1      cgd 
     89  1.22      cgd 	/* if the first port is in use as console, then it. */
     90  1.22      cgd 	if (iobase == comconsaddr && !comconsattached)
     91  1.22      cgd 		goto checkmappings;
     92  1.22      cgd 
     93  1.22      cgd 	if (bus_io_map(bc, iobase, COM_NPORTS, &ioh)) {
     94  1.22      cgd 		rv = 0;
     95  1.22      cgd 		goto out;
     96  1.22      cgd 	}
     97  1.22      cgd 	rv = comprobe1(bc, ioh, iobase);
     98  1.22      cgd 	bus_io_unmap(bc, ioh, COM_NPORTS);
     99  1.22      cgd 	if (rv == 0)
    100  1.22      cgd 		goto out;
    101  1.22      cgd 
    102  1.22      cgd checkmappings:
    103  1.22      cgd 	for (i = 1; i < NSLAVES; i++) {
    104  1.22      cgd 		iobase += COM_NPORTS;
    105  1.22      cgd 
    106  1.22      cgd 		if (iobase == comconsaddr && !comconsattached)
    107  1.22      cgd 			continue;
    108  1.22      cgd 
    109  1.22      cgd 		if (bus_io_map(bc, iobase, COM_NPORTS, &ioh)) {
    110  1.22      cgd 			rv = 0;
    111  1.22      cgd 			goto out;
    112  1.22      cgd 		}
    113  1.22      cgd 		bus_io_unmap(bc, ioh, COM_NPORTS);
    114  1.22      cgd 	}
    115   1.2  mycroft 
    116  1.22      cgd out:
    117  1.22      cgd 	if (rv)
    118  1.22      cgd 		ia->ia_iosize = NSLAVES * COM_NPORTS;
    119  1.22      cgd 	return (rv);
    120  1.10  mycroft }
    121  1.10  mycroft 
    122  1.10  mycroft int
    123  1.22      cgd astprint(aux, pnp)
    124  1.10  mycroft 	void *aux;
    125  1.22      cgd 	char *pnp;
    126  1.10  mycroft {
    127  1.22      cgd 	struct commulti_attach_args *ca = aux;
    128  1.10  mycroft 
    129  1.22      cgd 	if (pnp)
    130  1.22      cgd 		printf("com at %s", pnp);
    131  1.21      cgd 	printf(" slave %d", ca->ca_slave);
    132  1.22      cgd 	return (UNCONF);
    133   1.1      cgd }
    134   1.1      cgd 
    135   1.1      cgd void
    136   1.5  mycroft astattach(parent, self, aux)
    137   1.5  mycroft 	struct device *parent, *self;
    138   1.5  mycroft 	void *aux;
    139   1.1      cgd {
    140   1.5  mycroft 	struct ast_softc *sc = (void *)self;
    141   1.5  mycroft 	struct isa_attach_args *ia = aux;
    142  1.21      cgd 	struct commulti_attach_args ca;
    143  1.22      cgd 	int i, subunit;
    144  1.10  mycroft 
    145  1.22      cgd 	sc->sc_bc = ia->ia_bc;
    146  1.10  mycroft 	sc->sc_iobase = ia->ia_iobase;
    147   1.1      cgd 
    148  1.22      cgd 	for (i = 0; i < NSLAVES; i++)
    149  1.22      cgd 		if (bus_io_map(bc, sc->sc_iobase + i * COM_NPORTS, COM_NPORTS,
    150  1.22      cgd 		    &sc->sc_slaveioh[i]))
    151  1.22      cgd 			panic("astattach: couldn't map slave %d", i);
    152  1.22      cgd 
    153   1.5  mycroft 	/*
    154   1.5  mycroft 	 * Enable the master interrupt.
    155   1.5  mycroft 	 */
    156  1.22      cgd 	bus_io_write_1(bc, sc->sc_slaveioh[3], 7, 0x80);
    157  1.10  mycroft 
    158   1.5  mycroft 	printf("\n");
    159   1.5  mycroft 
    160  1.22      cgd 	for (i = 0; i < NSLAVES; i++) {
    161  1.22      cgd 		struct cfdata *match;
    162  1.22      cgd 
    163  1.22      cgd 		ca.ca_slave = i;
    164  1.22      cgd 		ca.ca_bc = sc->sc_bc;
    165  1.22      cgd 		ca.ca_ioh = sc->sc_slaveioh[i];
    166  1.22      cgd 		ca.ca_iobase = sc->sc_iobase + i * COM_NPORTS;
    167  1.22      cgd 		ca.ca_noien = 1;
    168  1.22      cgd 
    169  1.24      cgd 		sc->sc_slaves[i] = config_found(self, &ca, astprint);
    170  1.24      cgd 		if (sc->sc_slaves[i] != NULL)
    171  1.22      cgd 			sc->sc_alive |= 1 << i;
    172  1.10  mycroft 	}
    173   1.7  mycroft 
    174  1.19  mycroft 	sc->sc_ih = isa_intr_establish(ia->ia_irq, IST_EDGE, IPL_TTY, astintr,
    175  1.19  mycroft 	    sc);
    176   1.1      cgd }
    177   1.1      cgd 
    178   1.1      cgd int
    179  1.17      cgd astintr(arg)
    180  1.17      cgd 	void *arg;
    181   1.1      cgd {
    182  1.17      cgd 	struct ast_softc *sc = arg;
    183  1.22      cgd 	bus_chipset_tag_t bc = sc->sc_bc;
    184   1.2  mycroft 	int alive = sc->sc_alive;
    185   1.1      cgd 	int bits;
    186   1.1      cgd 
    187  1.22      cgd 	bits = ~bus_io_read_1(bc, sc->sc_slaveioh[3], 7) & alive;
    188   1.8  mycroft 	if (bits == 0)
    189  1.10  mycroft 		return (0);
    190   1.2  mycroft 
    191   1.8  mycroft 	for (;;) {
    192   1.2  mycroft #define	TRY(n) \
    193   1.8  mycroft 		if (bits & (1 << (n))) \
    194   1.5  mycroft 			comintr(sc->sc_slaves[n]);
    195   1.2  mycroft 		TRY(0);
    196   1.2  mycroft 		TRY(1);
    197   1.2  mycroft 		TRY(2);
    198   1.2  mycroft 		TRY(3);
    199   1.5  mycroft #undef TRY
    200  1.22      cgd 		bits = ~bus_io_read_1(bc, sc->sc_slaveioh[3], 7) & alive;
    201   1.8  mycroft 		if (bits == 0)
    202  1.10  mycroft 			return (1);
    203   1.8  mycroft  	}
    204   1.1      cgd }
    205